TPS79333DBVR

Product Overview

The TPS79333DBVR from Texas Instruments is a fixed-output linear voltage regulator IC that provides a positive 3.3V rail at up to 200mA. It is housed in a surface-mount SOT-23-5 package and includes an enable control function. The device supports a maximum input voltage of 5.5V and has a dropout voltage of 0.18V at 200mA. Its quiescent current is 220 µA, and the power supply rejection ratio is 70dB to 43dB from 100Hz to 100kHz. Protection features include over current, over temperature, reverse polarity, and under voltage lockout. The operating temperature range is -40°C to 150°C.

Key Features

• Positive fixed 3.3V output at 200mA
• Single regulator in SOT-23-5 surface-mount package
• Enable control for output activation management
• 0.18V dropout voltage at 200mA
• 220 µA quiescent current
• PSRR of 70dB to 43dB from 100Hz to 100kHz
• Over current, over temperature, reverse polarity, and UVLO protection
• Operating temperature range from -40°C to 150°C

Applications

• 3.3V supply rail for battery-powered portable devices
• Regulated 3.3V input to microcontroller subsystems
• Point-of-load regulation from a 5.5V maximum upstream rail
• Enable-controlled 3.3V supply sequencing in embedded systems
• Compact 3.3V linear regulation in space-constrained surface-mount assemblies

Design & Procurement Notes

For this fixed 3.3V regulator, confirm that the available input voltage remains within the 5.5V maximum and provides sufficient headroom for the 0.18V dropout at the intended load current. The enable control can be used to manage output activation, so the system controller interface should be reviewed for compatible drive conditions. The 220 µA quiescent current is relevant to always-on branches, while the PSRR data from 100Hz to 100kHz can inform input filtering decisions. The SOT-23-5 surface-mount package and -40°C to 150°C operating range should be considered during board layout and thermal review.